Display screen or portion thereof with icon



FIG. 1 is a front view of a display screen or portion thereof with icon, showing my new design; and,

FIG. 2 is a front view of a display screen or portion thereof with icon, showing an alternative embodiment of the new design.

The dot-dash broken lines illustrating portions of the display screen are included for the purpose of illustrating environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with icon, as shown and described. 